Also, very few projects will ever end up at the scale (user base/metrics) that Facebook had.
99% of all PHP software will be fine with a quadcore server with 4GB RAM, running a LAMP stack. This can be scaled as needed (eg moving off mysql, adding a reverse proxy, real load balancing).
99% of all PHP software will be fine with a quadcore server with 4GB RAM, running a LAMP stack. This can be scaled as needed (eg moving off mysql, adding a reverse proxy, real load balancing).